CN100461860C - Audio/video transmission system and method - Google Patents
Audio/video transmission system and method Download PDFInfo
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- CN100461860C CN100461860C CNB2005100779346A CN200510077934A CN100461860C CN 100461860 C CN100461860 C CN 100461860C CN B2005100779346 A CNB2005100779346 A CN B2005100779346A CN 200510077934 A CN200510077934 A CN 200510077934A CN 100461860 C CN100461860 C CN 100461860C
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Abstract
The invention relates to a method for transmitting video data via network and relative system, wherein said system comprises a video player connected to the video transmitter via network while the video player receives the video code signal of video transmitter and the video player displays said video code signal with the first operation condition, wherein the method comprises: the video player receives the operation command, based on operation command and the present operation condition, to generate and display the second operation condition; the video player transmits the operation command to the video transmitter; the video transmitter based on the received operation command changes the video code signal into the second operation condition, and transmits relative video code signal; the video player uses network to receive the video code signal, to transform the video code signal into one video display signal to display it.
Description
Technical field
The present invention relates to a kind of transmission method and system, particularly relate to protocol method and system by the audio-visual crossfire of Network Transmission.
Background technology
Along with the rise of wideband network and day by day ripe, the multimedia application of wideband has also become the main flow of consumption market.Based on the multimedia video-audio system of procotol, can provide of all kinds, immanent multimedia service.Fig. 1 is the schematic diagram at the audio-visual crossfire of transmission over networks.After television signal receives by frequency modulator 112, delivering to audio-visual conveyer 114 earlier encodes, by the television signal behind internet/LAN 116 transmission codings, again by the television signal behind audio-visual receiving terminal 118 received codes, the television signal after will encoding is at last passed to audio and video player 120 (as TV etc.) and is play.Because the development of wide frequency technology even TV and frequency modulator adhere to two places separately, still can be passed through the network delivery audio and video information.
But be that the audio-visual crossfire correlation technique of transmission medium still has the problem on the communications protocol with the network.Under general situation, the user does not also know the network address of audio-visual conveyer, the state of also not knowing audio-visual conveyer why, so the user manages reception information by directly controlling audio-visual receiver.And when the operational order that audio-visual receiver is assigned the user was sent to audio-visual transmission end, the situation that operational order postpones on network took place possibly.Fig. 2 is the control mode of traditional video-audio data.Opening under the beginning state A0, what the user watched is 42 channels, when the user wants to switch to succeeding channel, just audio-visual receiver has been descended an operational order, as steps A 1.After audio-visual receiver was received the aforesaid operations order, the instruction that audio-visual receiver transmits " channel up " by procotol was as steps A 2.And after audio-visual conveyer receives aforesaid operations instruction, to next control command of frequency modulator, make frequency modulator forward 43 channels to, as steps A 3.This moment, user's possibility was not because see 43 channels as yet owing to the delay of transmission over networks, and the operational order under thinking is not just now sent to, just send the operational order of a switching channels again, as steps A 4.This moment, frequency modulator captured the audio and video information of channel 43, and sent audio-visual conveyer to, as steps A 5.Yet the operational order of user under for the second time is the same to be transmitted by procotol by audio-visual receiver, and as steps A 6, and audio-visual conveyer is also sent to audio-visual receiver by procotol with the audio and video information of 43 channels, as steps A 7.Behind the operational order under audio-visual conveyer is received for the second time,, make frequency modulator forward 44 channels to, as steps A 8 to frequency modulator control next time again.This moment, the audio and video information of channel 43 may Delivered, and broadcasted on player, and as steps A 10, but audio-visual conveyer still continues by procotol the audio and video information of 44 channels to be sent to audio-visual receiver, as steps A 11.At last, what the user watched is the audio and video information of channel 44, as steps A 12.And 43 channels that the user originally wanted to see have been skipped.
The reason that above-mentioned situation takes place is because general agreement has only defined the communication way of the built-in frequency modulator of conventional television.And design the communication of only considering when on network, transmitting video-audio data between audio-visual conveyer and audio-visual receiver, therefore, the user is just wrong because of the network delay response in Network Transmission easily to the control of frequency modulator.
Summary of the invention
In view of this, the present invention proposes a kind of image and voice transmission method, the method is applicable to audio-visual display, audio-visual display receives and shows the audio-visual coding signal of audio-visual conveyer by network, audio-visual conveyer detects the mode of operation of audio-visual coding signal, and detected mode of operation is set at first mode of operation, its step includes: after audio-visual display receives operational order, produce one second mode of operation and show above-mentioned second mode of operation according to aforesaid operations order and above-mentioned first mode of operation, and transmit the aforesaid operations order to audio-visual conveyer; Above-mentioned audio-visual conveyer is changed an audio-visual coding signal according to the above-mentioned operational order that receives and is become above-mentioned second mode of operation, and transmits above-mentioned audio-visual coding signal; After above-mentioned audio-visual display received above-mentioned audio-visual coding signal by above-mentioned network, changing above-mentioned audio-visual coding signal was an audio-visual display signal, and shows above-mentioned audio-visual display signal.
The audio-visual method of Network Transmission of passing through proposed by the invention, wherein audio-visual display transfer operation order to the step of audio-visual conveyer with transmission control protocol (Transmission Control Protocol/Internet Protocol, TCP/IP) or other agreement that is equivalent to TCP/IP transmit.
In addition, the present invention also proposes a kind of audio-visual system for transmitting, comprises an audio-visual conveyer and an audio-visual display.Audio-visual conveyer is in order to transmitting an audio-visual coding signal,, detect the mode of operation of audio-visual coding signal, and detected mode of operation is set at first mode of operation, and audio-visual conveyer has one first control unit.Audio-visual display receives above-mentioned audio-visual coding signal by a network, and above-mentioned audio-visual display comprises: a display unit, an audio-visual decoding unit and one second control unit.Video decoder implementing is an audio-visual display signal in order to change above-mentioned audio-visual coding signal, and above-mentioned audio-visual coding signal has one first mode of operation, and shows above-mentioned audio-visual display signal in above-mentioned display unit.Second control unit is in order to receive an operational order, and the aforesaid operations order is sent to above-mentioned first control unit by above-mentioned network.And a state cache unit, in order to store above-mentioned first mode of operation, when above-mentioned second control unit received the aforesaid operations order, above-mentioned second control unit produced above-mentioned second mode of operation according to above-mentioned first mode of operation and aforesaid operations order.Audio/video transmission system proposed by the invention, wherein above-mentioned audio-visual display also includes a communication interface, in order to pass through TCP/IP transfer operation order.And above-mentioned audio-visual conveyer also includes a communication interface, in order to transmit the delivery status of aforesaid operations order and to transmit above-mentioned video-audio data by TCP/IP by TCP/IP.
Audio/video transmission system proposed by the invention, wherein above-mentioned audio-visual conveyer also includes a frequency modulator.And when the aforesaid operations order was changed platform for specifying above-mentioned frequency modulator, above-mentioned audio-visual display can show the channel number of being play at present.
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, a preferred embodiment cited below particularly, and be described with reference to the accompanying drawings as follows.
Description of drawings
Fig. 1 is the schematic diagram of audio-visual crossfire in transmission over networks;
Fig. 2 is the control mode of traditional video-audio data;
Fig. 3 is the execution mode by Network Transmission video-audio data method of the present invention; With
Fig. 4 is according to the described audio/video transmission system of one embodiment of the invention.
The reference numeral explanation
112 frequency modulators, 114 audio-visual conveyers
116 internets/LAN 118 audio-visual receivers
120 audio and video player A0,42 channel audio and video informations
A1 changes the order that a channel A2 transmits " channel up "
A3 changes to 43 channel A4 does not still have response, changes a channel again
A5 43 channel audio and video information A6 transmit the order of " channel up "
A7 transmits 43 channel audio and video information A8 and changes to 44 channels
A11 transmits 44 channel audio and video information A12,44 channel audio and video informations
B0 detects audio-visual coding signal B1 first mode of operation
B2 operational order B3 operational order
B4 shows that " operational order is assigned " B5 responds the delivery status of operational order
The audio-visual signal of B6 receiving channels 43, B7 transmit the audio-visual coding news of 43 channels
And be encoded into audio-visual coding signal number
The audio-visual coding B9 that B8 changes 43 channels shows the audio-visual demonstration news of 43 channels
The audio-visual display signal of signal number
42 audio-visual conveyer 44 audio-visual displays
46 networks, 48 state cache unit
50 display units, 51 remote controllers
52 audio-visual decoding unit 54 second control units
56 state cells, 60 first control units
62 audio-visual coding unit 64 frequency modulators
66 display and operation modules, 68 communication interfaces
70 communication interface AV
DispAudio-visual display signal
AV
EncoAudio-visual coding signal OP operational order
Embodiment
Network transfer method and system that the present invention proposes, the network transmission protocol transmission operational order by general makes the biography of audio and video information on network receive more smooth.
Fig. 3 is an embodiment of image and voice transmission method of the present invention.At the beginning, audio-visual conveyer detects the mode of operation of audio-visual coding signal, and detected mode of operation is set at first mode of operation, as step B0.Then, when audio-visual display started, audio-visual conveyer transmitted first mode of operation to above-mentioned audio-visual display, as step B1.The channel of being seen when this opens audio-visual display with user one is that the audio and video information of 42 channels is an example.When the user wants to change to succeeding channel, to changing the operational order of channel under the audio-visual display, as step B2, thus audio-visual display the operational order of this switching channels is sent on the audio-visual conveyer, as step B3.At this moment, audio-visual display is according to the estimation of operational order and first mode of operation and second mode of operation after demonstrating the order of switching channels, as step B4, allow the user can determine immediately that the aforesaid operations order assigns, can not carry out the action of repetition because of uncertain whether successful output function order, herein can the display operation state be that the screen of 43 channels indicates or allows the cognitive order of user to send really with complete black demonstration.In this step B3, operational order transmits by the TCP/IP communications protocol, so the transmission situation of operational order can respond to audio-visual display, as step B5.Audio-visual conveyer is according to the operational order of receiving, relocate the receiving other the source signal that comes, in the present embodiment, with the audio-visual signal that receives channel 43 is example, the audio and video information of the channel that frequency modulator is specified with operational order is delivered to audio-visual conveyer, audio-visual conveyer also is encoded into audio-visual coding signal with it, as step B6.Audio-visual conveyer transmits the audio-visual coding signal of 43 channels to audio-visual display, as step B7 by network again.When audio-visual display received audio-visual coding signal in 43 channels by network after, changing above-mentioned audio-visual coding signal was an audio-visual display signal, as step B8, and showed above-mentioned audio-visual display signal in step B9.
In another execution mode of the transmission method that the present invention proposes, first or second mode of operation can deliver to audio-visual display the display and operation module (On-Screen Display, OSD) in, and first or second mode of operation is shown in audio-visual display.
In another execution mode of the transmission method that the present invention proposes, wherein in the step B7, when the audio-visual conveyer video-audio data that operational order is specified is sent to above-mentioned audio-visual receiver, be to transmit with TCP/IP communications protocol or other agreement that is equivalent to the TCP/IP communications protocol.
In addition, in another embodiment of the present invention, the source signal that comes of audio-visual conveyer can be other audio-visual source, as DVD processor and DVD data slice.Same, when DVD processor and audio-visual display adhere to two places separately, DVD information can be passed to audio-visual conveyer, by network audio-visual information is passed to audio-visual receiver, again by broadcasts such as audio-visual display such as TVs.And when the user wants the output of DVD data adjusted, as change song, change chapters and sections, fast commentaries on classics, time-out, rewinding and change volume or the like, can be directly to operational order under the audio-visual display, and the transmission of the reception and registration of operational order and confirmation of receipt signal also be similar to shown in Figure 3.
Fig. 4 is according to the described audio/video transmission system of one embodiment of the invention, comprises an audio-visual conveyer 42 and an audio-visual display 44.
In the present embodiment, audio-visual conveyer 42 come source signal from a frequency modulator 64, an or VCD player 65 is in order to provide audio-visual coding signal AV
EncoWhen coming source signal from frequency modulator 64, it is that first control unit 60 is from frequency modulator 64 selected channels that native system has a mode of operation; When coming source signal to be VCD player 65, this moment operating conditions for change song, change chapters and sections, fast commentaries on classics, time-out, rewinding or change volume etc.Audio-visual conveyer 42 also includes a state cell 56, in order to detect and to store the aforesaid operations state.For instance, be frequency modulator 64 when coming source signal, and the channel of watching is when being 37 channels, the mode of operation of native system is " receiving 37 channels ", and stores present mode of operation in state cell 56 by first control unit 60.If this moment, the user was with audio-visual conveyer 42 shutdown, when then next audio-visual conveyer 42 is started shooting, still keep the audio-visual signal that receives 37 channels.Audio-visual conveyer 42 also includes an audio-visual coding unit 62, is audio-visual coding signal AV with the signal coding of frequency modulator 64 or VCD player 65
Enco, again with audio-visual coding signal AV
EncoTransmit by first control unit.
Audio-visual display 44 can be by the audio-visual coding signal AV of a network 46 receptions from audio-visual conveyer 42
EncoAudio-visual display 44 comprises: communication interface 70, display unit 50, audio-visual decoding unit 52, state cache unit 48 and second control unit 54.The audio-visual coding signal AV that audio-visual decoding unit 52 is received in order to conversion communication interface 70
EncoBe audio-visual display signal AV
Disp, and in the audio-visual display signal AV of display unit 50 demonstrations
Disp Second control unit 54 stores present mode of operation in order to display and operation module (OSD) 66 display operation states and the notify status buffer unit 48 that receives an operational order OP, notice display unit 50.Operational order OP also is sent to first control unit 60 of audio-visual conveyer 42 by network 46, make the audio-visual coding signal AV of first control unit, 60 changes
EncoMode of operation.Be the audio-visual signal of 37 channels by what see on the audio-visual display 44 when for instance, supposing at the beginning that the user opens audio-visual display 44.When the user wanted to change to succeeding channel, just to the operational order of 44 times switching channels of audio-visual display, second control unit was sent to this operational order on the audio-visual conveyer 42, relocates the receiving the audio-visual signal of 38 channels.At this moment, audio-visual conveyer 42 transmits information to the second control unit 54 of " having selected 38 channels ", and is shown by display unit 50.When audio-visual display is received the audio-visual coding signal of 38 channels after a while, transfer to by delivering to display unit 50 after audio-visual decoding unit 52 decodings, and the channel number that 48 records of state cache unit are watched down at present is 38.
In another embodiment of the present invention, second control unit 54 is also delivered to audio-visual decoding unit 52 with operating conditions, and audio-visual decoding unit 52 inserts above-mentioned audio-visual display signal AV with operating conditions
DispFor instance, when just watching 37 channels as the user, audio-visual decoding unit can together show the video content of " 37 channel " this information and 37 channels.So the user can know just the channel watched at present why.
In another embodiment of the present invention, audio-visual display 44 also comprises a man-machine interface 53, in order to receive the aforesaid operations order that the user operates audio-visual display 42.In addition, native system comprises that also a remote controller 51 is to allow the user can the audio-visual display of remote control.
In another embodiment of the present invention, wherein above-mentioned audio-visual conveyer and audio-visual display also comprise a communication interface 68,70 respectively, and the aforesaid operations order transmits with the TCP/IP communications protocol.
Network transfer method and system that the present invention proposes are by general network transmission protocol transmission operational order and to all real-time response of all operational orders, so that the control of audio and video information is more accurate.In addition, after audio-visual display is received operational order, can the display operation order assign, add that the confirmation of receipt signal that audio-visual conveyer responds to audio-visual display transmits by TCP, and TCP has flow control, bag is confirmed and failure after characteristic such as can retransfer, so the present invention can allow the user that assigns operational order grasp the practice condition of order really.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limit the present invention; those skilled in the art can do some changes and retouching under the premise without departing from the spirit and scope of the present invention, so protection scope of the present invention is as the criterion with the application's claim.
Claims (19)
1. audio-visual transfer control method, be applicable to an audio-visual display, this audio-visual display receives and shows an audio-visual coding signal of an audio-visual conveyer by a network, audio-visual conveyer detects the mode of operation of audio-visual coding signal, and detected mode of operation is set at first mode of operation, said method comprises:
Receive an operational order, produce one second mode of operation and show above-mentioned second mode of operation according to aforesaid operations order and above-mentioned first mode of operation; And
Transmit the aforesaid operations order to above-mentioned audio-visual conveyer via above-mentioned network;
Wherein, above-mentioned audio-visual conveyer according to aforesaid operations order change above-mentioned audio-visual coding signal and make its corresponding above-mentioned second mode of operation, and transmit above-mentioned audio-visual coding signal to above-mentioned audio-visual display by above-mentioned network.
2. audio-visual transfer control method as claimed in claim 1, the step that wherein transmits or receive the aforesaid operations order by above-mentioned network transmits or receives the aforesaid operations order with the TCP/IP communications protocol.
3. audio-visual transfer control method as claimed in claim 1 more comprises:
Connect above-mentioned audio-visual display and above-mentioned audio-visual conveyer via above-mentioned network; And
Above-mentioned audio-visual conveyer transmits above-mentioned first mode of operation to above-mentioned audio-visual display and stores.
4. audio-visual transfer control method as claimed in claim 3 more comprises:
Start above-mentioned audio-visual display; And
Above-mentioned audio-visual conveyer detects the mode of operation of above-mentioned audio-visual coding signal as above-mentioned first mode of operation.
5. audio-visual transfer control method as claimed in claim 1 comprises that also receiving one comes source signal, and above-mentioned source signal encoding is become above-mentioned audio-visual coding signal.
6. audio-visual transfer control method as claimed in claim 5, wherein when above-mentioned when coming source signal from a frequency modulator, above-mentioned first mode of operation is above-mentionedly to come source signal in the channel of above-mentioned frequency modulator.
7. audio-visual transfer control method as claimed in claim 5, wherein above-mentioned when coming source signal from a VCD player, above-mentioned first mode of operation optionally for change song, change chapters and sections, fast commentaries on classics, time-out, rewinding or change volume.
8. audio-visual transfer control method as claimed in claim 1, wherein above-mentioned audio-visual display inserts above-mentioned second mode of operation in the above-mentioned audio-visual coding signal and shows above-mentioned audio-visual coding signal.
9. audio-visual transfer control method as claimed in claim 1, above-mentioned audio-visual display comprise that also a man-machine interface is in order to receive the aforesaid operations order that a user operates above-mentioned audio-visual display.
10. audio/video transmission system comprises:
One audio-visual conveyer in order to transmit an audio-visual coding signal, detects the mode of operation of audio-visual coding signal, and detected mode of operation is set at first mode of operation, and above-mentioned audio-visual conveyer has one first control unit;
One audio-visual display receives above-mentioned audio-visual coding signal by a network, and above-mentioned audio-visual display comprises:
One display unit;
One audio-visual decoding unit is an audio-visual display signal in order to change above-mentioned audio-visual coding signal, and shows above-mentioned audio-visual display signal in above-mentioned display unit that above-mentioned audio-visual coding signal has one first mode of operation; And
One second control unit, in order to receive an operational order, the aforesaid operations order is sent to above-mentioned first control unit by above-mentioned network; And
One state cache unit, in order to store above-mentioned first mode of operation, when above-mentioned second control unit received the aforesaid operations order, above-mentioned second control unit produced above-mentioned second mode of operation according to above-mentioned first mode of operation and aforesaid operations order.
11. audio/video transmission system as claimed in claim 10, wherein above-mentioned audio-visual conveyer and audio-visual display also comprise a communication interface respectively, and the aforesaid operations order is transmitted with the TCP/IP communications protocol.
12. audio/video transmission system as claimed in claim 10, wherein when above-mentioned audio-visual display and above-mentioned audio-visual conveyer set up by above-mentioned network link after, above-mentioned audio-visual conveyer transmits above-mentioned first mode of operation of above-mentioned relatively audio-visual coding signal to above-mentioned audio-visual display.
13. audio/video transmission system as claimed in claim 12, above-mentioned audio-visual conveyer more comprises:
One state cell, in order to store above-mentioned first mode of operation, when above-mentioned audio-visual conveyer was started shooting, above-mentioned audio-visual conveyer detected the mode of operation of above-mentioned audio-visual coding signal as above-mentioned first mode of operation.
14. audio/video transmission system as claimed in claim 10, above-mentioned audio-visual conveyer also comprises a coding unit, at least onely comes source signal in order to receive one, and above-mentioned coding unit becomes above-mentioned audio-visual coding signal with above-mentioned source signal encoding.
15. audio/video transmission system as claimed in claim 14 wherein above-mentionedly at least onely comes source signal from a frequency modulator, above-mentioned first mode of operation is above-mentionedly at least onely to come source signal in the channel of above-mentioned frequency modulator.
16. audio/video transmission system as claimed in claim 14 wherein above-mentionedly at least onely comes source signal from a VCD player, above-mentioned first mode of operation optionally for change song, change chapters and sections, fast commentaries on classics, time-out, rewinding or change volume.
17. audio/video transmission system as claimed in claim 10, wherein above-mentioned display unit also comprises a display and operation module, and above-mentioned second control unit is delivered to above-mentioned display and operation module with above-mentioned second mode of operation and is shown in above-mentioned display unit.
18. audio/video transmission system as claimed in claim 10, wherein above-mentioned second control unit is delivered to above-mentioned audio-visual decoding unit with above-mentioned second mode of operation, and above-mentioned audio-visual decoding unit inserts above-mentioned audio-visual display signal with above-mentioned second mode of operation.
19. audio/video transmission system as claimed in claim 10, above-mentioned audio-visual display also comprises a man-machine interface, in order to receive the aforesaid operations order that a user operates above-mentioned audio-visual display.
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| CNB2005100779346A CN100461860C (en) | 2005-06-15 | 2005-06-15 | Audio/video transmission system and method |
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| CN1278138A (en) * | 1999-06-18 | 2000-12-27 | 汤姆森多媒体公司 | Method and arrangement for switching programme of digital type TV |
| US6195089B1 (en) * | 1996-08-14 | 2001-02-27 | Samsung Electronics Co., Ltd. | Television graphical user interface having variable channel changer icons |
| CN1452399A (en) * | 2002-04-18 | 2003-10-29 | 三星电子株式会社 | Method for change of channel in digital broadcast service |
| CN1540984A (en) * | 2003-04-23 | 2004-10-27 | 明基电通股份有限公司 | Method for processing image quality and transmitting set |
| CN1625174A (en) * | 2003-12-02 | 2005-06-08 | 明基电通股份有限公司 | Local network transmission control method |
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| US5594492A (en) * | 1994-05-26 | 1997-01-14 | Bell Atlantic Network Services, Inc. | Method and apparatus for rapid channel selection |
| US6195089B1 (en) * | 1996-08-14 | 2001-02-27 | Samsung Electronics Co., Ltd. | Television graphical user interface having variable channel changer icons |
| CN1278138A (en) * | 1999-06-18 | 2000-12-27 | 汤姆森多媒体公司 | Method and arrangement for switching programme of digital type TV |
| CN1452399A (en) * | 2002-04-18 | 2003-10-29 | 三星电子株式会社 | Method for change of channel in digital broadcast service |
| CN1540984A (en) * | 2003-04-23 | 2004-10-27 | 明基电通股份有限公司 | Method for processing image quality and transmitting set |
| CN1625174A (en) * | 2003-12-02 | 2005-06-08 | 明基电通股份有限公司 | Local network transmission control method |
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